diff --git a/rules/Php82/Rector/Class_/ReadOnlyClassRector.php b/rules/Php82/Rector/Class_/ReadOnlyClassRector.php
index a7be21a5ec5..b43dfee3cae 100644
--- a/rules/Php82/Rector/Class_/ReadOnlyClassRector.php
+++ b/rules/Php82/Rector/Class_/ReadOnlyClassRector.php
@@ -144,6 +144,11 @@ private function hasNonTypedProperty(array $properties): bool
 
     private function shouldSkip(Class_ $class, Scope $scope): bool
     {
+        $classReflection = $scope->getClassReflection();
+        if (! $classReflection instanceof ClassReflection) {
+            return true;
+        }
+
         if ($this->shouldSkipClass($class)) {
             return true;
         }
diff --git a/tests/Issues/ExtendsNotReadOnlyClass/ExtendsNotReadOnlyClassTest.php b/tests/Issues/ExtendsNotReadOnlyClass/ExtendsNotReadOnlyClassTest.php
new file mode 100644
index 00000000000..7d717cfaa39
--- /dev/null
+++ b/tests/Issues/ExtendsNotReadOnlyClass/ExtendsNotReadOnlyClassTest.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Core\Tests\Issues\ExtendsNotReadOnlyClass;
+
+use Iterator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+final class ExtendsNotReadOnlyClassTest extends AbstractRectorTestCase
+{
+    #[DataProvider('provideData')]
+    public function test(string $filePath): void
+    {
+        $this->doTestFile($filePath);
+    }
+
+    public static function provideData(): Iterator
+    {
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}
diff --git a/tests/Issues/ExtendsNotReadOnlyClass/Fixture/fixture.php.inc b/tests/Issues/ExtendsNotReadOnlyClass/Fixture/fixture.php.inc
new file mode 100644
index 00000000000..31e66b00344
--- /dev/null
+++ b/tests/Issues/ExtendsNotReadOnlyClass/Fixture/fixture.php.inc
@@ -0,0 +1,39 @@
+<?php
+
+namespace Rector\Core\Tests\Issues\ExtendsNotReadOnlyClass\Fixture;
+
+use Rector\Core\Tests\Issues\ExtendsNotReadOnlyClass\Source\ParentIsNonReadOnlyClass;
+
+class Fixture extends ParentIsNonReadOnlyClass
+{
+    public function __construct(
+        private string $foo
+    ) {}
+
+    public function run(): string
+    {
+        return $this->foo;
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Core\Tests\Issues\ExtendsNotReadOnlyClass\Fixture;
+
+use Rector\Core\Tests\Issues\ExtendsNotReadOnlyClass\Source\ParentIsNonReadOnlyClass;
+
+final class Fixture extends ParentIsNonReadOnlyClass
+{
+    public function __construct(
+        private readonly string $foo
+    ) {}
+
+    public function run(): string
+    {
+        return $this->foo;
+    }
+}
+
+?>
diff --git a/tests/Issues/ExtendsNotReadOnlyClass/Source/ParentIsNonReadOnlyClass.php b/tests/Issues/ExtendsNotReadOnlyClass/Source/ParentIsNonReadOnlyClass.php
new file mode 100644
index 00000000000..8cca7094af3
--- /dev/null
+++ b/tests/Issues/ExtendsNotReadOnlyClass/Source/ParentIsNonReadOnlyClass.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Core\Tests\Issues\ExtendsNotReadOnlyClass\Source;
+
+class ParentIsNonReadOnlyClass
+{
+}
diff --git a/tests/Issues/ExtendsNotReadOnlyClass/config/configured_rule.php b/tests/Issues/ExtendsNotReadOnlyClass/config/configured_rule.php
new file mode 100644
index 00000000000..b36b5515847
--- /dev/null
+++ b/tests/Issues/ExtendsNotReadOnlyClass/config/configured_rule.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\Php81\Rector\Property\ReadOnlyPropertyRector;
+use Rector\Php82\Rector\Class_\ReadOnlyClassRector;
+use Rector\Privatization\Rector\Class_\FinalizeClassesWithoutChildrenRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->rules([
+        ReadOnlyPropertyRector::class,
+        FinalizeClassesWithoutChildrenRector::class,
+        ReadOnlyClassRector::class,
+    ]);
+};